JPH0419659A - Image recorder - Google Patents

Abstract

PURPOSE:To improve the quality of an outputted image by attaching a back tension adding mechanism which adds fixed back tension to the supply roll of a photosensitive recording medium. CONSTITUTION:A cartridge 42 which houses the roll photosensitive recording medium 41 inside lest it should be exposed is disposed at the upper part on the upstream side of an aligning device, and the medium 41 is wound to a supply roll 43 to which the fixed back tension is added by the back tension adding mechanism 200. Therefore, the sagging which occurs in the case of drawing out the photosensitive recording medium can be removed. Thus, faulty exposure caused by the sagging of the photosensitive recording medium is surely prevented and appropriate exposure is performed, then the quality of the image is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording apparatus, and particularly to an image recording apparatus for forming a color image using mask originals of different colors.

[Conventional technology]

Conventionally, a color image recording device has been developed in which a monochrome laser printer is coupled to the upper part, and this color image recording device forms a color image using a mask original created by the monochrome laser printer. being done.

Inside such a color image recording device, there is an alignment device for arranging the mask original conveyed from the monochrome laser printer, and near this alignment device, there are red, green, and blue filters. An exposure device having an exposure device is disposed along the alignment device so as to be able to scan freely.

Further, on the lower surface side of the alignment device, a photosensitive recording medium that is brought into close contact with the lower surface side of the belt through the mask original plate during exposure is continuously arranged, and on the downstream side of the alignment device, a photosensitive recording medium is continuously arranged. A pressure developing device is provided for overlapping and developing the exposed photosensitive recording medium and the color developer sheet.

The photosensitive recording medium is wound around a supply roll and is housed inside a cartridge so that the photosensitive recording medium is not exposed to light.

In the color image recording apparatus, the red (R) and green (G) images carried in from the monochrome racer are
, blue (B) mask masters are sequentially conveyed to the alignment device, and the exposure device is scanned with the photosensitive recording medium in close contact with the mask master, thereby aligning the mask master onto the photosensitive recording medium. transfer the image. Then, by performing this operation on each color mask original using red, green, and blue filters, a latent image is formed on the photosensitive recording medium. Thereafter, the photosensitive recording medium is conveyed to the pressure developing device, and the pressure developing device
A color image is formed on the color developer sheet by heating the color developer sheet and the photosensitive recording medium in a superimposed state.

[Invention or problem to be solved]

However, in the conventional image recording apparatus, the photosensitive recording medium wound around the supply roll inside the cartridge is pulled out at a predetermined length at a time, and exposure is performed while the photosensitive recording medium is in close contact with the mask original. The supply roll has conventionally been formed to be freely rotatable. Therefore, when the photosensitive recording medium is pulled out, inertia is imparted to the supply roll, and more photosensitive recording media than necessary may be pulled out. In this state, the photosensitive recording medium is brought into close contact with the original mask and exposed to light, causing wrinkles and scratches on the photosensitive recording medium, making it impossible to perform proper exposure.As a result, the quality of the output image after development deteriorates significantly. There is a problem that it ends up happening.

The present invention has been made in view of the above-mentioned points, and provides an image recording device that can prevent a photosensitive recording medium from sagging during exposure, perform proper exposure, and improve output image quality. The purpose is to

[Means to solve the problem]

In order to achieve the above object, an image recording device according to the present invention includes:
An alignment device for arranging the mask original is disposed therein, and a cartridge is disposed for supplying a photosensitive recording medium wound around a supply roller to the mask original portion, and the mask original is placed near the alignment device. an exposure device that forms a latent image on the photosensitive recording medium, and a pressure developing device that superimposes the exposed photosensitive recording medium and a color developer sheet and develops the image under pressure. In the recording device,
A back tension applying mechanism for applying a constant back tension to the supply roll of the photosensitive recording medium is attached.

[Effect]

According to the present invention, since a back tension applying mechanism is attached to the supply roll of the photosensitive recording medium to apply a constant back tension, the slack of the photosensitive recording medium that occurs when the photosensitive recording medium is pulled out is reduced. As a result, exposure defects due to sagging of the photosensitive recording medium can be reliably prevented and proper exposure can be performed.
This makes it possible to significantly improve image quality.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows an embodiment of a color image recording device in which a monochrome laser printer is connected to the upper part.
A polygon scanner 3 is disposed above the photoreceptor 2, which irradiates the outer peripheral surface of the photoreceptor 2 with a laser beam to draw an electrostatic latent image. Further, the photoreceptor 2
A developing device 4 is disposed on the outer periphery of the photoreceptor 2 to make the electrostatic latent image visible by adhering toner to the electrostatic latent image. A transfer device 5 for transferring the toner image onto paper is also provided.

On the upstream side of the monochrome laser printer 1, a paper feed cassette 6 containing paper such as plain paper or OHP sheets is removably installed. A paper feed roller 7 is provided to convey the paper sheets in the cassette 6 one by one between the photoreceptor 2 and the transfer device 5.

Furthermore, a fixing device 8 is disposed downstream of the photoreceptor 2 of the monochrome laser printer 1, and a conveying roller 9 and a paper path switching device 10 are disposed downstream of the fixing device 8. ing. Furthermore, a monochrome paper ejection tray 11 is disposed above the monochrome laser printer 1, and an automatic document feeder (ADF) is installed downstream of the monochrome laser printer 1 via a receiving roller 12.
) A tray 13 is provided.

Then, the paper conveyed from the fixing device 8 is ejected to the monochrome paper ejection tray 11 by the paper path switching device 10 if a black and white image is required, and if a color image is required, the paper is ejected to the ADF. ) is discharged to Ray 13.

Furthermore, the ADF tray 13 guides the paper ejected from the monochrome laser printer 1 downward and carries it into the color image recording device 14. Three sheets or a set of monochrome printed papers are used as mask original plates 15 (15R, 15G, 15R, 15G,
15B).

Note that the monochrome laser printer 1 normally records image data transmitted from a host computer (not shown).

Next, the configuration of the color image recording device 14 will be explained.

An alignment device 16 is disposed inside and below the color image recording device 14, and this alignment device 16 connects a glass plate 17 and feed rollers 18 and 19 disposed at both ends of this glass plate 170. have. In addition, the AD
A mask original conveying path 20 is formed between the F h-ray 13 and the alignment device 16, and above this mask original conveying path 20, the mask original 15 of the ADF h-ray 13 is placed in front of the ADF h-ray 13. A feeding roller 21 for feeding the mask original to the mask original transport path 20 and a recurling roller 22 for removing curls from the mask original 15 are provided, respectively.

Further, a mask original storage section 23 is arranged on one side of the mask original transport path 20 in parallel with the mask original transport path 20, and near the mask original transport side of the alignment device 16, the A gate 24 for switching between the mask original transport path 20 and the mask original storage section 23 is provided. Further, a mask original discharge tray 25 for discharging unnecessary mask originals 15 is disposed on the mask original discharge side of the alignment device 16, and above this mask original discharge tray 25, A mask original retraction section 26 is formed. Near the mask original discharge side of the alignment device 16, the mask original discharge tray 25 and the mask original retraction section 2 are provided.
A gate 24 is provided between the alignment device 16 and each gate 24, 27, and between the mask original transport path 20, the mask original storage section 23, the mask original discharge tray 25, and the mask original paper storage section 23. The original retracting section 26 includes a pair of transport rollers 28 and 2 for transporting the mask original 15.
9, 30, 31, 32, and 33 are arranged so as to be rotatable in forward and reverse directions.

Further, the mask original discharge tray 2 of the alignment device 16
An exposure device 34 extending in the width direction of the alignment device 16 is disposed below the alignment device 16 so as to be able to reciprocate along the alignment device 16. A reflector plate 36 for reflecting the light emitted from the lamp 35 is disposed below the lamp 35.
5 and the reflective plate 36, a filter unit 37 is disposed in which a red filter 37R, a green filter 37G, and a blue filter 37B are switchably formed.

Further, a flat plate-shaped exposure table 38 is disposed near the top of the alignment device 16, and a drive device (not shown) drives the exposure table 38 on the lower surface thereof to move the exposure table 38 up and down. A cam 39 is provided for causing the rotation. Furthermore, a fixed roller 40 is disposed at the left end of the exposure table 38 in the drawing.

Furthermore, a cartridge 42 is disposed above the alignment device 16 on the upstream side, and stores a roll-shaped photosensitive recording medium 41 therein so as not to be exposed to light. is wound around a supply roll 43 to which a constant back tension is applied by a back tension applying mechanism 200 (FIG. 2). The photosensitive recording medium 41 is mainly made of a photocurable resin using a photopolymerization initiator disclosed in JP-A-62-143044, and is resistant to light of red, green, and blue wavelengths. Microcapsules containing a curing photocurable resin and cyan, macenda, and yellow dye precursors are coated on a base sheet. This photosensitive recording medium 41 is guided to the lower surface side of the exposure table 38, and is transported a predetermined length in one direction as the three mask originals 15R, 15G, and 15B are transported.

Then, the photosensitive recording medium 41 is moved onto the mask original 15 transported onto the glass plate 17 of the alignment device 16 by lowering the exposure table 38 using the cam 39.
and the photosensitive recording medium 41 are brought into close contact with each other. The recording medium 41 is placed on the exposure table 38
It is designed to be fixed to

Further, above the exposure table 38, a pair of pressure rollers 4 are provided.
A pressure developing device 45 having built-in components 4 and 44 is disposed between the exposure table 38 and the pressure developing device 45. A buffer roller 46 for preventing sagging is disposed so as to be movable in the left and right direction.

Furthermore, a winding roller 47 for winding up the photosensitive recording medium 41 is disposed above the pressure developing device 45, and between the pressure developing device 45 and the winding roller 47, the photosensitive recording medium 41 is disposed. A color developer sheet separation roller 49 that separates the recording medium 41 and the color developer sheet 48 and a drive roller 50 that conveys the photosensitive recording medium 41 at a constant speed are provided. The photosensitive recording medium 41 in the cartridge 42 passes between the glass plate 17 of the alignment device 16 and the exposure table 38, and then passes through the buffer roller 46, the pressure developing device 45, and the developer sheet separation roller 49. The photosensitive recording medium 41 passes through a drive roller 50 and a winding roller 47, respectively, and is wound onto a winding roller 47.
Each latent image is conveyed at a constant pitch, and the photosensitive recording medium 41 is stopped when it is conveyed to the leading end of the latent image or to the pressure roller 44 of the pressure developing device 45. The stop position is determined from the rotation speed of the drive roller 50.

Further, below the color image recording device 14, a sheet cassette 51 for storing a color developer sheet 48 is removably disposed, and above the sheet cassette 5,
A suction cup 53 is provided which is intermittently oscillated by a drive device (not shown) and feeds the developer sheets 48 one by one to the paper feed roller 52. The developer sheet 48 supplied to the paper feed roller 52 is superimposed on the photosensitive recording medium 41 formed as an image or latent image on the mask original plate 15 by exposure by the exposure device 34, and is then pressed by the pressure developing device 45. It is designed to be sent between rollers 44. The color developer sheet 48 is constructed by applying a color developer disclosed in Japanese Patent Application Laid-Open No. 58-88739 onto a base paper, and there is a color developer coated surface in the sheet cassette 51. It is stored facing downwards.

Further, above the pressure developing device 45, a heat fixing device 5 is provided.
4 are arranged below the heat fixing device 54.
a pair of rollers 55, one of which is adjacent to the separation roller 49;
, 56 are provided. Rubber rollers 5859.60 are in contact with the upper surface of the endless belt 57, and the developed color developer sheet 48 separated from the separation roller 49 is conveyed by the endless belt 57 and the rubber rollers 58.5960. It is supposed to be done. Further, above the endless belt 57, a heater 62 and an impeller 63 which are housed in a casing 61 and heat the color developer sheet 48 are arranged.

Further, on the downstream side of the thermal fixing device W54, a sheet discharge tray 64 for discharging the color developer sheet 48 conveyed from the pressure developing device 45 to the thermal fixing device 54 is provided.

FIG. 2 shows a back tensioning mechanism 20 according to the present invention.
0, by this mechanism 200, the photosensitive recording medium 4
A constant back tension is applied at the roll rotation center so that the roll is rewound in the direction to take up the slack that occurs in the roll. That is, the DC motor 205 is operated to rotate the friction wheel 204 fixed to the output shaft 205a of the DC motor 205 in the direction of arrow N in the figure. As a result, the friction wheel 204
The friction wheel 203 that is in contact with rotates in the direction of arrow 0 in the figure, and the supply roll 43 on which the photosensitive recording medium 41 is wound is driven in the direction of winding up the photosensitive recording medium 41 (in the direction of arrow P in the figure). . Also, at this time, the rotation state of the DC motor 205 is detected by the sensor 207 via the encoder 206, and this detection signal is input to the control device 208. Then, within this control device 208, the winding diameter of the supply roll 43 is detected based on the detection signal from the sensor 207. Then, D
The driving state such as the current value of the C motor 205 is controlled.

Next, the operation of forming a color image from a set of mask originals 15R, 15G, and 15B using the image recording apparatus configured as described above will be described.

First, microcapsules containing a cyan dye precursor are hardened in the microcapsules coated on the photosensitive recording medium 41 (a mask original plate for red with toner as a light-shielding image attached to other parts). When creating 15R, the polygon scanner 3 is used based on a predetermined image signal.
is driven to form an electrostatic latent image on the surface of the photoreceptor 2, and a developer 4 causes toner to adhere to the electrostatic latent image to make it visible. On the other hand, the paper feed roller 7 is driven to transport the paper in the paper cassette 6 one by one between the photoreceptor 2 and the transfer device 5, and the transfer device transfers the toner image onto the paper. , the toner image is fixed by a fixing device 8, and this paper is transferred to A as a mask original 15R via a conveying roller 9, a paper path switching device 10, and a receiving roller 12.
It is transported to the DFh ray 13.

Thereafter, by driving the feeding roller 21, the mask original 15R is sent to the mask original transport path 20, and the mask original 15R is curled by the recurler roller 22, and then transferred to the transport roller 28, 30 and the gate. 2
4 to the alignment device 16. At this time,
The gate 24 is located at the position indicated by the solid line in FIG.

Next, by driving the feed roller 18, the mask original 15R is transported to a predetermined exposure position on the glass plate 17 of the alignment device 16, and the buffer roller 46 is moved in advance from the broken line position to the solid line position. By moving the photosensitive recording medium 41 in the E direction, the photosensitive recording medium 41 is pulled out to the lower surface side of the exposure table 38 by a predetermined length. At this time,
The upstream side of the photosensitive recording medium 41 is braked by a pressure roller 44 or the like, and the portion of the photosensitive recording medium 41 where the color image has been exposed is braked by a buffer roller 46 as the pressure developing device 45 operates. By moving in the direction of arrow F, the toner is sent to the pressure developing device 45.

Then, by driving the cam 39, the exposure table 3
8 to a predetermined position, and by pressing the fixed roller 40 on the left end thereof, the pulled out photosensitive recording medium 41 is fixed to the exposure table 38, and then the exposure table 38 is further lowered by the cam 39. , the photosensitive recording medium 41
Mask original plate 15R on the glass plate 17 of the alignment device
Closely contact.

In this state, by lighting the lamp 35 of the exposure device 34 and moving the exposure device 34 in the direction of the arrow along the glass plate 17, the red light from the red filters 3 and 7R passes through the mask original 15R and is exposed to light. The recording medium 41 is irradiated with scanning exposure. After exposure, lamp 35
is turned off, and the exposure device 34 is moved back in the direction of arrow B. At this time, the filter unit 37 is operated by a drive source (not shown) of the exposure device 34, and the green filter 37G is moved above the lamp 35.

Then, while the exposure device 34 moves backward, the exposure table 38 is raised by the rotation of the cam 39, and the photosensitive recording medium 41 is separated from the alignment device 16 and the mask original 15R.

At this time, in this embodiment, back tension is applied to the supply roll 43 of the photosensitive recording medium 41 by the back tension applying mechanism 200, so that the tension of the photosensitive recording medium 41 that occurs when the photosensitive recording medium 41 is pulled out is It is designed to take up slack in the photosensitive recording medium 41 that occurs when the exposure table 38 rises after exposure.

After the exposure of the red mask master plate 15R is completed, the exposure table 38 is raised only to a predetermined position, and the photosensitive recording medium 41 is transferred to the exposure table by a fixed roller 40 pressed against the left end of the exposure table 38. It is held fixed at 38.

Next, in the same way as the above operation, a green mask original 15G is created using the monochrome laser printer 1, and whether this mask original 15G is used, the ADF tray 13, the feeding roller 21,
When the mask original 15R is conveyed through the recurler roller 22, through the mask original conveyance path 20, and just before the conveyance roller 28, the feed rollers 18, 19 and the conveyance rollers 31, 33 are driven, and the mask original 15R is retracted through the gate 27. Part 2
6 and transported out of the alignment device 16.

At this time, the gates 24 and 27 are at the positions indicated by solid lines in FIG. 1, and the exposed mask original 15R is held between the conveyance rollers 33 at a position where its rear end passes through the gates 27.

Also, at the same time, the conveyance roller 28, 30 and the feed roller 1
8 and 19, the mask original 15G is aligned with the alignment device 16.
is transported to a predetermined exposure position and stopped.

Then, as in the case of the mask original 15R, the mask original 15G is moved onto the photosensitive recording medium 4 by lowering the exposure table 38.
Exposure with green light is performed by moving the exposure device 34 while turning on the lamp 35 of the exposure device 34 while in close contact with the green light.

This mask original plate 15G is a mask original plate in which toner, which is a light-shielding image, is attached to other parts of the microcapsules coated on the photosensitive recording medium 41 in order to harden the microcapsules containing a magenta dye precursor. 15G
It is.

After the exposure is completed, the exposure table 38 is raised to a predetermined position, and the exposure device 34 is moved back to the original position, and the filter unit 37 is activated so that the blue filter 37B is positioned above the lamp 35. I'll let it happen.

Next, when the blue mask original 15B created by the monochrome laser printer 1 is transported just before the transport roller 28, the transport rollers 18, 19 and 3
1 and 32 to transport the mask original 15G to the mask original discharge tray 25 through the gate 27,
The mask original 115B is transported to the exposure position and stopped.

At this time, the gate 24 is at the position shown by the solid line, and the gate 27 is at the position shown by the broken line, and the exposed mask original 15G is held between the transport rollers 32 with its rear end passing through the gate 27.

This mask original plate 15B is different from other mask original plates 15R and 15.
Similarly to G, the photosensitive recording medium 41 is brought into close contact with the photosensitive recording medium 41, and the photosensitive recording medium 41 is exposed to blue light through the mask original plate 15B.

This mask original plate 15B is a mask original plate in which toner, which is a light-shielding image, is attached to other parts of the microcapsules coated on the photosensitive recording medium 41 in order to harden the microcapsules containing a yellow dye precursor. 15B
It is.

Through the above operations, a latent image of a desired color image is recorded on the photosensitive recording medium 41.

Thereafter, the exposure table 38 is raised to the initial position by the cam 39, and the left end of the exposure table 38 is separated from the fixed aperture 40 to release the fixation of the photosensitive recording medium 41.

At this time, as the preceding latent image formed on the photosensitive recording medium 41 is developed, the buffer roller 46 has been moved to the position shown by the broken line, and by moving this buffer roller 46 in the direction of arrow E, The unexposed portion of the photosensitive recording medium 41 is pulled out below the exposure table 38 .

Then, by moving the buffer roller 46 in the direction of arrow F and rotating the drive roller 50, the exposed portion of the photosensitive recording medium 41 is transferred to the pressure developing device 45.
move it to

On the other hand, in synchronization with the movement of the photosensitive recording medium 41, the color developer sheet 48 is taken out from the sheet cassette 51 by the suction cup 53, and the leading edge of the color developer sheet 48 is moved from the surface of the photosensitive recording medium 41 by the paper feed roller 52. It is transported so as to correspond to the leading edge of the image.

Then, this color developer sheet 48 is applied to the drive roller 50.
The polymerized state is sent between the pressure rollers 44 and pressurized with the photosensitive recording medium 41, which is moved by the pressure roller 44. As a result, the uncured microcapsules on the photosensitive recording medium 41 are destroyed by the pressure and exposed. A photosensitive recording medium 41 is placed on the colorant sheet 48.
A color image corresponding to the upper latent image is developed. At this time, when the pressure roller 44 of the pressure developing device 45 rotates in the direction of the arrow F, the buffer roller 46 is moved in the direction of the arrow F.

Note that during this development process, the photosensitive recording medium 41 is placed on the exposure table 3.
8 and a fixed roller 40, and the exposure device 3
4, exposure processing for the next color image is being performed.

The developer sheet 48 after development is peeled off from the photosensitive recording medium 41 by a separating roller 49 and conveyed to a heat fixing device 54 , and the photosensitive recording medium 41 after peeling is wound up by a winding roller 47 .

The color developer sheet 48 is attached to the endless belt 5.
7 and rubber rollers 58, 59, 60, and while being transported, the color developer sheet 48 is heated by the heater 62 of the heat fixing device 54, and is heated by the impeller 63. The casing 61 is heated by the warm air circulating inside it, and the color development of the color image is promoted. At the same time, the binder polymer (binder resin) for fixing the color developing medium to the base paper of the color developer sheet 48 is thermally melted, the surface becomes smooth, and the surface of the color developer sheet 48 has a moderate gloss. It is formed.

Thereafter, the developer sheet 48 that has been subjected to color development and gloss processing is discharged to the sheet discharge tray 64, and the desired image forming process is completed.

Furthermore, when outputting the same image, it is done as follows. First, by driving the feed rollers 18 and 19 and the conveyance rollers 28 and 30, the mask original 15B is placed at the exposure position.
is carried out to the left, and the mask original 15R held in the mask original retraction part 26 is conveyed to the alignment device 16.

At this time, the mask original plate 15B is located at the rear end or at the gate 24.
It is held by the conveyance roller 28 at the position where it passes through.

Then, the mask original 15 transported to the alignment device 16
After alignment, R is brought into close contact with the photosensitive recording medium 41 by lowering the exposure table 38 and exposed to red light.

Next, the mask original 15R is transported to the mask original storage unit 23 and held by the transport rollers 29, and the mask original 15G held on the mask original discharge tray 25 is transported to the alignment device 16.

Similarly, this mask original 15G is brought into close contact with the photosensitive recording medium 41 and exposed to green light.

Next, the mask original 15G is conveyed to the mask original retraction part 26, and the mask original 15B held by the conveyance roller 28 is conveyed to the alignment device, and the photosensitive recording medium 4
1 and exposed to blue light.

By the above operation, a latent image of the same color image as that previously formed is formed on the photosensitive recording medium 41, and by pressing the photosensitive recording medium 41 and the color developer sheet 48 in a superimposed state, the same color image is formed. Then, a color image is formed on the developer sheet 48.

Thereafter, by repeating the same operation, a predetermined number of color images can be formed from one set of mask originals 15R, 15G, and 15B.

After obtaining the necessary number of color images from the same mask original plate 15, the transport rollers 28, 2930, 31, 32.
33, the mask originals 15R, 15G, and 15B are discharged onto the mask original discharge tray 25.

In addition, if the next mask original 15 is output from the monochrome laser printer 1 while a series of color images are being exposed, it is stored once in the ADF tray 13, and after the exposure process is completed, the next mask master 15 is outputted from the monochrome laser printer 1. 1 by the feed roller 21
The sheets are fed into the color image recording device 14 one by one.

In addition, when reusing the mask original 15 output from another monochrome laser printer 1 or the previously used mask original 15, by setting these mask originals 15 on the ADF) ray 13, any mask original can be used. 15 supplies can be made.

Therefore, in this embodiment, the back tension applying mechanism 200 that applies a constant back tension to the supply roll 43 of the photosensitive recording medium 41 is installed, so that when the photosensitive recording medium 41 is pulled out, The slack of the photosensitive recording medium 41 can be rolled up and removed, and as a result, exposure defects due to the slack of the photosensitive recording medium 41 can be reliably prevented and proper exposure can be performed, thereby significantly improving image quality. I can do it.

〔Effect of the invention〕

As described above, in the image recording apparatus according to the present invention, the back tension applying mechanism is attached to the supply roll of the photosensitive recording medium, so that the slack in the photosensitive recording medium that occurs when the photosensitive recording medium is pulled out is wound up and removed. Therefore, exposure defects due to sagging of the photosensitive recording medium can be reliably prevented. As a result, it is possible to carry out appropriate exposure, and the image quality can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an image recording apparatus according to the present invention, and FIG. 2 is a perspective view showing a back tension applying mechanism of the image recording apparatus shown in FIG. DESCRIPTION OF SYMBOLS 1... Monochrome laser printer, 13... ADF tray, 14... Color image recording device, 15... Mask original plate, 16... Positioning device, 34... Exposure device, 37... Filter, 38... Exposure table, 39... Cam, 41... Photosensitive recording medium, 42... Cartridge, 43... Supply roll, 45... Pressure developing device, 47... Winding up Roller, 48... Color developer sheet, 51... Sheet cassette, 54... Heat fixing device, 7... Endless belt, 64. Sheet discharge tray,... Back tensing addition mechanism.

Claims (1)

[Claims] An alignment device for arranging the mask original is disposed therein, and a cartridge is disposed for supplying a photosensitive recording medium wound around a supply roller to the mask original portion, and the mask original is placed near the alignment device. an exposure device that forms a latent image on the photosensitive recording medium, and a pressure developing device that superimposes the exposed photosensitive recording medium and a color developer sheet and develops the image under pressure. In the recording device,
An image recording apparatus characterized in that a back tension applying mechanism is attached to the supply roll of the photosensitive recording medium to apply a constant back tension.